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Range of Trenton Species 



Ling ul a sp., c, 

 Trcmatis terminalis, rr, 

 Dalmanella testudinaria, a, 

 Platystrophia lynx, a, 

 Rafincsquina alternata, r, 

 R. del to idea, rr, 

 Plectambonites serieeus, c, 

 Zygospira recurvirostris, r, 

 Bellerophon bilobatus, a, 



Aasphus platycephalus, r, 

 Calymene senaria, r, 

 Ceraurus pleurexanthemus , r, 

 Diplograptus amplexicaulis, r, 

 Conularia trentonensis , rr, 

 Monticidipora lycoperdon, c, 



—Orllwceras sp. , c, 



-Endoceras sp., r, 

 Crinoid columns c. 



L. 60-62 of notes. Top of A 6 and base of A , P. & C. 



Somewhat crystalline layers interbedded with shale, ending in 

 an impure nodular layer which is full of crinoid stems. Well 

 exposed on east side of creek at top of High Pall and along the 



stream to Mill Dam Fall. 

 9 in. = 178 ft. 2 in. 



Litigula rectilateralis, rr, 

 Lingula sp. , r, 

 Trematis terminalis , rr, 

 Dalmanella testudinaria, a, 

 Platystrophia lynx, aa, 

 Raji?iesqui?ia atternala, c, 

 R. del to idea, r, 

 Plectambonites serieeus, r, 

 Rhynchotrema incequivalve , r, 



Zone of Platystrophia lynx. 22 ft. 



Zygospira recurvirostris, r, 

 Bellerophon bilobatus, rr, 

 Asaphus platycephalus, r, 

 Calymene senaria, rr, 

 Ceraurus pleurexanthemus , r, 

 Monticidipora lycoperdon, r, 

 Pelecypoda sps., r, 

 —Orthoceras sp., r, 

 Crinoid columns a. 



M. 63-64 of notes. Top of A ? and base of A 8 , P. & C. 



Pure, fine-grained, black limestone in rather thin layers with 

 shaly partings. Breaks with conchoidal fracture. Well shown 

 in trench dug by the Electric Power Co. Second zone of Plec- 

 tambonites serieeus. 22 ft. 8 in. = 200 ft. 10 in. 



Lingula rectilateralis, rr 

 Lingula, sp. , c, 

 Trematis terminalis, rr, 

 Dalmanella testudinaria 

 Platystrophia lynx, rr, 

 Rafinesquina alter nata, c, 

 R. del to idea, c, 

 Plectambonites serieeus, a, 

 Zygospira recurviYostris, r, 



Asaphus platycephalus, r, 

 Calymene senaria, r, 

 Ceraurus pleurexanthemus , r. 

 c, Leperditia sp., r,' 



Monticulipo?'a lycoperdon , rr, 

 —Orthoceras sp. , r, 

 Poteriocrinus gracilis, r, 

 Crinoid columns, r. 



